JP6200614B1 - Manufacturing method of degassing valve - Google Patents

Abstract

There is provided a method for manufacturing a vent valve that does not require injection of a viscous fluid before being attached to a container and that can manufacture a vent valve of a constant quality. A method for manufacturing a gas vent valve 1 includes a perforating step of making a hole in a first film attached to a mount, and a viscous fluid is applied to the surface of the first film in a straight line passing through the hole. An application step, and a bonding step of laminating the second film on the surface of the first film and bonding the first film and the second film at a portion sandwiching the viscous fluid. [Selection] Figure 6

Description

  The present invention relates to a method for manufacturing a gas vent valve.

  Coffee, miso, pickles, fermented foods, etc. are sealed and stored in containers such as packaging bags in order to keep the food fresh. Since gas is generated from such food, a vent hole is opened in the container to discharge the gas, and a vent valve is installed here. As a degassing valve, there is a label-like degassing valve 1 that can be used by simply sticking to a container (for example, Patent Documents 1 and 2).

  The gas vent valve 1 has a structure in which a cover film is laminated on a base film having vent holes. The base film and the cover film have an adhesion part bonded so as to sandwich the air hole and a non-adhesion part not bonded, and the non-adhesion part functions as a gas discharge channel. In the non-adhered part, the base film and the cover film are usually in close contact with each other. However, when the inside of the container exceeds a predetermined pressure due to the gas generated in the container, the cover film in the non-adhered part is separated from the base film. A gas discharge channel is formed, and the gas in the container is discharged from the gas vent hole and the vent hole through the gas discharge channel.

  The degassing valve has a function of suppressing the inflow of gas (air) from the outside into the container when the pressure in the container is lower than the predetermined pressure, the base film and the cover film in the non-adhered part are in close contact with each other. Required. For this reason, a viscous fluid such as silicone oil is injected from the vent hole with an injector or the like so that the base film and the cover film are in close contact with each other, and after forming a viscous fluid film between the base film and the cover film, the gas A valve is attached to the container.

JP 7-291306 A JP 2006-62277 A

  Until now, since the viscous fluid is injected between the base film and the cover film before being attached to the container, the work before being attached becomes complicated. Further, since the viscous fluid is injected from the vent hole, it is difficult to form a uniform viscous fluid film between the base film and the cover film, and it is difficult to ensure a certain quality.

  The present invention has been made in view of the above matters, and the purpose of the present invention is to eliminate the need for injecting a viscous fluid before being attached to a container and to provide a degassing valve capable of producing a degassing valve of a certain quality. It is to provide a manufacturing method.

A method for producing a gas vent valve according to the present invention includes:
A perforating step of making a hole in the first film affixed to the mount;
An application step of applying silicone oil in a straight line passing through the holes on the surface of the first film;
An adhesion step of laminating a second film on the surface of the first film, and bonding the first film and the second film at a portion sandwiching the silicone oil ,
It is characterized by that.

Also, using the first film in the form of a band,
In the perforating step, a plurality of the holes are formed linearly in the first film along the longitudinal direction of the first film,
In the application step, the silicone oil is preferably applied in a straight line connecting the plurality of holes.

  Moreover, it is preferable to provide the notch | incision process which makes the notch of the closed loop used as the external shape of the said degassing valve in the said 1st film and the said 2nd film after the said adhesion process.

  Moreover, it is preferable to provide the peeling process which peels from the said mount, leaving the location enclosed by the said closed loop of the said 1st film and the said 2nd film after the said cutting process.

  In the method for producing a gas vent valve according to the present invention, it is not necessary to inject a viscous fluid before being attached to a container, and a homogeneous gas vent valve can be produced.

FIG. 1A is a plan view showing a manufacturing state of a gas vent valve, and FIG. 1B is a cross-sectional view taken along line A-A ′ of FIG. 2A is a plan view showing the manufacturing status of the gas vent valve, FIG. 2B is a cross-sectional view taken along the line AA ′ in FIG. 2A, and FIG. 2C is a cross-sectional view taken along the line B- in FIG. It is B 'sectional drawing. It is a perspective view which shows a mode that the viscous fluid is apply | coated. 4A is a plan view showing the manufacturing status of the gas vent valve, FIG. 4B is a cross-sectional view taken along the line AA ′ in FIG. 4A, and FIG. 4C is a cross-sectional view taken along the line B- in FIG. It is B 'sectional drawing. 5A is a plan view showing the manufacturing status of the gas vent valve, FIG. 5B is a cross-sectional view taken along the line AA ′ in FIG. 5A, and FIG. 5C is a cross-sectional view taken along the line B- in FIG. It is B 'sectional drawing. 6A is a plan view of the manufactured gas vent valve, FIG. 6B is a cross-sectional view taken along line AA ′ of FIG. 6A, and FIG. 6C is BB of FIG. 6A. 'Cross section. It is a disassembled perspective view which shows the structure of a gas vent valve. It is a perspective view which shows the use condition of a gas vent valve.

  With reference to the drawings, a method for manufacturing the gas vent valve according to the present embodiment will be described. The method for manufacturing a gas vent valve includes a perforation process, a coating process, an adhesion process, a cutting process, and a peeling process.

  First, as shown to FIG. 1 (A) and (B), the 1st film F1 affixed on the mount Se is prepared. The 1st film F1 is a film used as the base film of a gas vent valve. On the back surface of the first film F1, an adhesive layer is provided so as to be attached to the container. Here, an example in which a plurality of gas vent valves are manufactured using a long strip-like first film F1 wound in a roll shape as the first film F1 will be described.

  First, in the perforating step, as shown in FIGS. 2A to 2C, a hole Ha having a predetermined shape to be a ventilation hole is formed in the first film F1. The hole Ha may be formed, for example, by using a punch with a predetermined shape and cutting out the entire mount Se to form the hole Ha in the first film F1. This hole Ha becomes a vent hole of the gas vent valve.

  It is preferable to form a plurality of holes Ha in a straight line continuously at a predetermined interval in the longitudinal direction of the strip-shaped first film F1. Moreover, you may open several hole Ha continuously in the transversal direction of the strip | belt-shaped 1st film F1. Here, the three holes Ha are formed in the short direction of the belt-like first film F1, but more or less may be formed.

  Next, the coating process will be described. In the application step, a viscous fluid is applied on the first film F1. The viscous fluid is applied in a straight line passing through the hole Ha. Thus, a viscous fluid film is formed on the surface of the first film F1.

  The viscous fluid can be applied, for example, as shown in FIG. Here, the viscous fluid is applied using the application roller 30 including the application unit 31. The application roller 30 has an application part 31 that goes around the outer peripheral surface. The application unit 31 may have any configuration as long as it holds the viscous fluid on the surface and can be applied to the first film F1, for example, the application unit 31 is a viscous fluid from a porous member such as a sponge. The structure which impregnates is mentioned. The application roller 30 is rotated in a state where the application part 31 of the application roller 30 is in contact with the first film F1. Thereby, as shown in FIG. 3, it is the surface of the 1st film F1, and it can apply | coat a viscous fluid continuously in the linear form which passes the hole Ha.

  The form of supplying the viscous fluid to the application part 31 and applying to the first film F1 is a form in which the viscous fluid is attached to the surface of the application part 31 and the viscous fluid is transferred to the first film F1. Can be mentioned. Moreover, it is the application roller 30 which can hold | maintain viscous fluid inside, Comprising: The form etc. which discharge | emit and apply viscous fluid from the application part 31 using what can be supplied to the application part 31 from the inside of the application roller 30 are mentioned. .

  Any viscous fluid may be used as long as it can be applied to the first film F1, such as silicone oil, and the adhesion between the base film and the cover film can be ensured.

  Next, the bonding process will be described. In the bonding step, as shown in FIGS. 4A to 4C, the second film F2 is laminated on the first film F1, and the first film F1 and the second film F2 are bonded. To do. The 2nd film F2 is a film used as the cover film of a gas vent valve. Similarly to the first film F1, the second film F2 is a band-shaped film.

  The adhesion site | part of the 1st film F1 and the 2nd film F2 is a location where the viscous fluid is not apply | coated. That is, the adhesion site is a site that sandwiches the hole Ha and the viscous fluid film. The first film F1 and the second film F2 may be bonded using a known adhesive or pressure-sensitive adhesive. Moreover, you may laminate | stack and adhere | attach this on the 1st film F1, using the 2nd film F2 which has an adhesive layer in an adhesion | attachment site | part beforehand. Alternatively, when laminating the second film F2, an adhesive or the like is applied to the front surface of the first film F1 or the back surface of the second film F2, and the second film F2 is laminated to the first film F1, It may be glued. Moreover, you may adhere | attach by the technique which can adhere | attach the 1st film F1 and the 2nd film F2, such as ultrasonic welding other than adhesion | attachment using an adhesive agent or an adhesive.

  Next, the cutting process will be described. As shown in FIGS. 5A to 5C, a closed loop cut is made in the first film F1 and the second film F2. The shape of this closed loop is the outer shape of the gas vent valve. The closed-loop cutting may be performed by a known method. For example, by using a cutting roll having a closed-loop blade protruding on the surface, the first film F1 and the second film F2 are rotated while pressing the cutting roll. Cuts can be made in the first film F1 and the second film F2.

  Then, a peeling process is demonstrated. In the peeling step, unnecessary portions of the first film F1 and the second film F2, that is, portions not surrounded by the closed loop are peeled from the mount Se.

  As described above, as shown in FIGS. 6 (A) to 6 (C) and FIG. 7, the cover film 20 is laminated and bonded on the base film 10 having the air holes Hb, and is attached to the mount Se. The gas vent valve 1 can be manufactured.

  The degassing valve 1 has a label shape and is provided with an adhesive layer on the back surface of the base film 10, so that one by one is taken from the backing sheet Se, and the degassing hole Hc of the container Pa is formed as shown in FIG. The vent hole Hb of the gas vent valve 1 is aligned, and the gas vent hole Hc is pasted and used so as to close the hole.

  As shown in FIG. 7, the gas vent valve 1 has a structure in which a cover film 20 is laminated on a base film 10 having a vent hole Hb, and the base film 10 and the cover film 20 are vent holes Hb. Are bonded to each other so as to sandwich the non-bonded portion Nb between the bonded portions Bo. In the non-adhesion site Nb, a viscous fluid film is provided between the base film 10 and the cover film 20.

  The base film 10 and the cover film 20 are in close contact with each other at the non-adhered portion Nb. However, when the inside of the container Pa exceeds a predetermined pressure by the gas generated in the container Pa, the cover film 20 at the non-adhered portion Nb is A gas discharge flow path is formed apart from 10 and exhibits the function of discharging the gas in the container Pa from the gas vent hole Hc and the vent hole Hb through the gas discharge flow path. In a state where the pressure in the container Pa is lower than the predetermined pressure, the base film 10 and the cover film 20 in the non-adhered portion Nb are in close contact with each other through the viscous fluid film, and the gas from the outside into the container Pa Demonstrates the function of suppressing inflow.

  The degassing valve 1 manufactured by the method for manufacturing the degassing valve according to the present embodiment includes a viscous fluid film between the base film 10 and the cover film 20. There is no need to inject the viscous fluid from the vent hole Hb before sticking.

  In addition, since the viscous fluid is applied to the surface of the first film F1 before the second film F2 is bonded, the thickness of the viscous fluid can be made almost constant. For this reason, the fixed quality of the obtained gas vent valve 1 is ensured.

  In addition, as the first film F1 and the second film F2, for example, a film made of a resin such as polyethylene or polypropylene can be cited, but any material can be used as long as it functions as a gas vent valve. It may be configured.

  Moreover, although the example using the strip | belt-shaped 1st film F1 and the 2nd film F2 was demonstrated above, it is not limited to this, The sheet-like 1st film F1 and 2nd film F2, such as a rectangle, are used. It may be used.

  Moreover, although the method to manufacture a several degassing valve continuously was demonstrated, you may manufacture one by one. For example, using the first film F1 and the second film F2 that are preliminarily matched to the outline of the gas vent valve, the hole Ha is formed in the first film, and the viscous fluid is applied in a straight line passing through the hole, and then The second film F2 may be laminated and bonded to the first film F1. In this case, the cutting process and the peeling process are unnecessary.

  Further, in the perforating step, the hole Ha may be formed so as not to cut out the whole mount Se, but to cut the first film F1 and peel the first film F1 at that location from the mount Se.

  In the drilling step, rounded rectangular holes are formed, but the hole may have a circular shape, an elliptical shape, a polygonal shape, or the like.

  Further, in the cutting process, a rectangular closed loop cut with rounded corners is cut, but the cut can be in the shape of a desired gas vent valve to be manufactured, such as a circular shape, an elliptical shape, or a polygonal shape.

DESCRIPTION OF SYMBOLS 1 Gas vent valve 10 Base film 20 Cover film 30 Application | coating roller 31 Application | coating part F1 1st film F2 2nd film Se Mount Ha hole Hb Vent hole Hc Degassing hole Bo Adhesion site Nb Non-adhesion site Pa Container

Claims (4)

A perforating step of making a hole in the first film affixed to the mount;
An application step of applying silicone oil in a straight line passing through the holes on the surface of the first film;
An adhesion step of laminating a second film on the surface of the first film, and bonding the first film and the second film at a portion sandwiching the silicone oil ,
A method for producing a gas vent valve. Using the strip-shaped first film,
In the perforating step, a plurality of the holes are formed linearly in the first film along the longitudinal direction of the first film,
In the application step, the silicone oil is applied in a straight line connecting the plurality of holes.
The method for producing a vent valve according to claim 1. After the adhering step, the first film and the second film comprises a notch step of making a closed loop incision that becomes the outer shape of the degassing valve,
The method for producing a vent valve according to claim 1 or 2. After the cutting step, the first film and the second film, the separation step of separating from the mount, leaving a portion surrounded by the closed loop,
The method for producing a vent valve according to claim 3.

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